Influence of potassium and kinetin on protein partitioning in rice
1989
Sakeena, I. | Salam, M.A. (Kerala Agricultural Univ., Karamana, Trivandrum (India). Cropping Systems Research Centre)
Protein content in leaf, sheath, and culm decreased with increased K up to 29.1 kg/ha. Protein yield increased K level, a 106% increase in plants treated with 58 kg K/ha. Plants treated with 58 kg K/ha contained 71.6% of the total protein in the sink. In general, protein content of source (leaf, sheath, or culm) decreased with kinetin spray, with a corresponding increase in grain protein content. Two sprays of kinetin resulted in accumulation of the highest amount of protein in the grain (9.37%). Protein yield also increased with kinetin spray. The sink of plants treated with two sprays of kinetin contained 507 kg protein/ha, 71% of total protein. There was a significant negative correlation between grain yield and protein content of leaf (-0.72** ), sheath (-0.81** ) and culm (-0.39** ); there was a significantly positive correlation between grain yield and protein content of panicle (0.91** ). The K-kinetin interaction was significant on protein content of leaf, sheath, and panicle, and synergistic on grain protein and total protein yield. Application of 29.1 kg K/ha with two sprays of kinetin resulted in the highest accumulation of protein in the sink (73.6 %). These results indicate a synergistic K kinetin interaction to mobilize protein from source to sink.
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